mirror of git://gcc.gnu.org/git/gcc.git
371 lines
8.9 KiB
Go
371 lines
8.9 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package net
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import (
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"bytes"
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"errors"
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"fmt"
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"os"
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"reflect"
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"testing"
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"time"
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)
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type resolveIPAddrTest struct {
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net string
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litAddr string
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addr *IPAddr
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err error
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}
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var resolveIPAddrTests = []resolveIPAddrTest{
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{"ip", "127.0.0.1", &IPAddr{IP: IPv4(127, 0, 0, 1)}, nil},
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{"ip4", "127.0.0.1", &IPAddr{IP: IPv4(127, 0, 0, 1)}, nil},
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{"ip4:icmp", "127.0.0.1", &IPAddr{IP: IPv4(127, 0, 0, 1)}, nil},
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{"ip", "::1", &IPAddr{IP: ParseIP("::1")}, nil},
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{"ip6", "::1", &IPAddr{IP: ParseIP("::1")}, nil},
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{"ip6:ipv6-icmp", "::1", &IPAddr{IP: ParseIP("::1")}, nil},
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{"ip", "::1%en0", &IPAddr{IP: ParseIP("::1"), Zone: "en0"}, nil},
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{"ip6", "::1%911", &IPAddr{IP: ParseIP("::1"), Zone: "911"}, nil},
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{"", "127.0.0.1", &IPAddr{IP: IPv4(127, 0, 0, 1)}, nil}, // Go 1.0 behavior
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{"", "::1", &IPAddr{IP: ParseIP("::1")}, nil}, // Go 1.0 behavior
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{"l2tp", "127.0.0.1", nil, UnknownNetworkError("l2tp")},
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{"l2tp:gre", "127.0.0.1", nil, UnknownNetworkError("l2tp:gre")},
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{"tcp", "1.2.3.4:123", nil, UnknownNetworkError("tcp")},
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}
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func init() {
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if ifi := loopbackInterface(); ifi != nil {
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index := fmt.Sprintf("%v", ifi.Index)
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resolveIPAddrTests = append(resolveIPAddrTests, []resolveIPAddrTest{
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{"ip6", "fe80::1%" + ifi.Name, &IPAddr{IP: ParseIP("fe80::1"), Zone: zoneToString(ifi.Index)}, nil},
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{"ip6", "fe80::1%" + index, &IPAddr{IP: ParseIP("fe80::1"), Zone: index}, nil},
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}...)
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}
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}
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func TestResolveIPAddr(t *testing.T) {
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for _, tt := range resolveIPAddrTests {
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addr, err := ResolveIPAddr(tt.net, tt.litAddr)
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if err != tt.err {
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condFatalf(t, "ResolveIPAddr(%v, %v) failed: %v", tt.net, tt.litAddr, err)
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} else if !reflect.DeepEqual(addr, tt.addr) {
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t.Fatalf("got %#v; expected %#v", addr, tt.addr)
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}
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}
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}
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var icmpEchoTests = []struct {
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net string
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laddr string
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raddr string
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}{
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{"ip4:icmp", "0.0.0.0", "127.0.0.1"},
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{"ip6:ipv6-icmp", "::", "::1"},
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}
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func TestConnICMPEcho(t *testing.T) {
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if os.Getuid() != 0 {
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t.Skip("skipping test; must be root")
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}
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for i, tt := range icmpEchoTests {
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net, _, err := parseNetwork(tt.net)
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if err != nil {
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t.Fatalf("parseNetwork failed: %v", err)
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}
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if net == "ip6" && !supportsIPv6 {
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continue
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}
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c, err := Dial(tt.net, tt.raddr)
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if err != nil {
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t.Fatalf("Dial failed: %v", err)
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}
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c.SetDeadline(time.Now().Add(100 * time.Millisecond))
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defer c.Close()
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typ := icmpv4EchoRequest
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if net == "ip6" {
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typ = icmpv6EchoRequest
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}
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xid, xseq := os.Getpid()&0xffff, i+1
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b, err := (&icmpMessage{
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Type: typ, Code: 0,
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Body: &icmpEcho{
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ID: xid, Seq: xseq,
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Data: bytes.Repeat([]byte("Go Go Gadget Ping!!!"), 3),
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},
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}).Marshal()
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if err != nil {
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t.Fatalf("icmpMessage.Marshal failed: %v", err)
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}
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if _, err := c.Write(b); err != nil {
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t.Fatalf("Conn.Write failed: %v", err)
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}
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var m *icmpMessage
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for {
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if _, err := c.Read(b); err != nil {
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t.Fatalf("Conn.Read failed: %v", err)
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}
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if net == "ip4" {
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b = ipv4Payload(b)
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}
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if m, err = parseICMPMessage(b); err != nil {
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t.Fatalf("parseICMPMessage failed: %v", err)
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}
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switch m.Type {
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case icmpv4EchoRequest, icmpv6EchoRequest:
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continue
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}
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break
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}
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switch p := m.Body.(type) {
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case *icmpEcho:
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if p.ID != xid || p.Seq != xseq {
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t.Fatalf("got id=%v, seqnum=%v; expected id=%v, seqnum=%v", p.ID, p.Seq, xid, xseq)
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}
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default:
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t.Fatalf("got type=%v, code=%v; expected type=%v, code=%v", m.Type, m.Code, typ, 0)
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}
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}
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}
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func TestPacketConnICMPEcho(t *testing.T) {
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if os.Getuid() != 0 {
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t.Skip("skipping test; must be root")
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}
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for i, tt := range icmpEchoTests {
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net, _, err := parseNetwork(tt.net)
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if err != nil {
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t.Fatalf("parseNetwork failed: %v", err)
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}
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if net == "ip6" && !supportsIPv6 {
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continue
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}
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c, err := ListenPacket(tt.net, tt.laddr)
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if err != nil {
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t.Fatalf("ListenPacket failed: %v", err)
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}
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c.SetDeadline(time.Now().Add(100 * time.Millisecond))
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defer c.Close()
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ra, err := ResolveIPAddr(tt.net, tt.raddr)
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if err != nil {
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t.Fatalf("ResolveIPAddr failed: %v", err)
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}
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typ := icmpv4EchoRequest
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if net == "ip6" {
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typ = icmpv6EchoRequest
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}
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xid, xseq := os.Getpid()&0xffff, i+1
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b, err := (&icmpMessage{
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Type: typ, Code: 0,
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Body: &icmpEcho{
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ID: xid, Seq: xseq,
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Data: bytes.Repeat([]byte("Go Go Gadget Ping!!!"), 3),
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},
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}).Marshal()
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if err != nil {
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t.Fatalf("icmpMessage.Marshal failed: %v", err)
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}
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if _, err := c.WriteTo(b, ra); err != nil {
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t.Fatalf("PacketConn.WriteTo failed: %v", err)
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}
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var m *icmpMessage
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for {
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if _, _, err := c.ReadFrom(b); err != nil {
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t.Fatalf("PacketConn.ReadFrom failed: %v", err)
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}
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// TODO: fix issue 3944
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//if net == "ip4" {
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// b = ipv4Payload(b)
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//}
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if m, err = parseICMPMessage(b); err != nil {
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t.Fatalf("parseICMPMessage failed: %v", err)
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}
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switch m.Type {
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case icmpv4EchoRequest, icmpv6EchoRequest:
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continue
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}
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break
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}
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switch p := m.Body.(type) {
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case *icmpEcho:
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if p.ID != xid || p.Seq != xseq {
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t.Fatalf("got id=%v, seqnum=%v; expected id=%v, seqnum=%v", p.ID, p.Seq, xid, xseq)
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}
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default:
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t.Fatalf("got type=%v, code=%v; expected type=%v, code=%v", m.Type, m.Code, typ, 0)
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}
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}
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}
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func ipv4Payload(b []byte) []byte {
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if len(b) < 20 {
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return b
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}
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hdrlen := int(b[0]&0x0f) << 2
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return b[hdrlen:]
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}
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const (
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icmpv4EchoRequest = 8
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icmpv4EchoReply = 0
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icmpv6EchoRequest = 128
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icmpv6EchoReply = 129
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)
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// icmpMessage represents an ICMP message.
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type icmpMessage struct {
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Type int // type
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Code int // code
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Checksum int // checksum
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Body icmpMessageBody // body
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}
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// icmpMessageBody represents an ICMP message body.
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type icmpMessageBody interface {
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Len() int
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Marshal() ([]byte, error)
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}
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// Marshal returns the binary enconding of the ICMP echo request or
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// reply message m.
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func (m *icmpMessage) Marshal() ([]byte, error) {
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b := []byte{byte(m.Type), byte(m.Code), 0, 0}
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if m.Body != nil && m.Body.Len() != 0 {
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mb, err := m.Body.Marshal()
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if err != nil {
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return nil, err
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}
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b = append(b, mb...)
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}
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switch m.Type {
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case icmpv6EchoRequest, icmpv6EchoReply:
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return b, nil
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}
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csumcv := len(b) - 1 // checksum coverage
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s := uint32(0)
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for i := 0; i < csumcv; i += 2 {
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s += uint32(b[i+1])<<8 | uint32(b[i])
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}
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if csumcv&1 == 0 {
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s += uint32(b[csumcv])
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}
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s = s>>16 + s&0xffff
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s = s + s>>16
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// Place checksum back in header; using ^= avoids the
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// assumption the checksum bytes are zero.
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b[2] ^= byte(^s & 0xff)
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b[3] ^= byte(^s >> 8)
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return b, nil
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}
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// parseICMPMessage parses b as an ICMP message.
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func parseICMPMessage(b []byte) (*icmpMessage, error) {
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msglen := len(b)
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if msglen < 4 {
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return nil, errors.New("message too short")
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}
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m := &icmpMessage{Type: int(b[0]), Code: int(b[1]), Checksum: int(b[2])<<8 | int(b[3])}
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if msglen > 4 {
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var err error
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switch m.Type {
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case icmpv4EchoRequest, icmpv4EchoReply, icmpv6EchoRequest, icmpv6EchoReply:
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m.Body, err = parseICMPEcho(b[4:])
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if err != nil {
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return nil, err
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}
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}
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}
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return m, nil
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}
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// imcpEcho represenets an ICMP echo request or reply message body.
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type icmpEcho struct {
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ID int // identifier
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Seq int // sequence number
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Data []byte // data
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}
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func (p *icmpEcho) Len() int {
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if p == nil {
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return 0
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}
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return 4 + len(p.Data)
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}
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// Marshal returns the binary enconding of the ICMP echo request or
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// reply message body p.
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func (p *icmpEcho) Marshal() ([]byte, error) {
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b := make([]byte, 4+len(p.Data))
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b[0], b[1] = byte(p.ID>>8), byte(p.ID&0xff)
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b[2], b[3] = byte(p.Seq>>8), byte(p.Seq&0xff)
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copy(b[4:], p.Data)
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return b, nil
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}
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// parseICMPEcho parses b as an ICMP echo request or reply message
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// body.
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func parseICMPEcho(b []byte) (*icmpEcho, error) {
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bodylen := len(b)
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p := &icmpEcho{ID: int(b[0])<<8 | int(b[1]), Seq: int(b[2])<<8 | int(b[3])}
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if bodylen > 4 {
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p.Data = make([]byte, bodylen-4)
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copy(p.Data, b[4:])
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}
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return p, nil
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}
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var ipConnLocalNameTests = []struct {
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net string
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laddr *IPAddr
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}{
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{"ip4:icmp", &IPAddr{IP: IPv4(127, 0, 0, 1)}},
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{"ip4:icmp", &IPAddr{}},
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{"ip4:icmp", nil},
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}
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func TestIPConnLocalName(t *testing.T) {
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if os.Getuid() != 0 {
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t.Skip("skipping test; must be root")
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}
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for _, tt := range ipConnLocalNameTests {
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c, err := ListenIP(tt.net, tt.laddr)
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if err != nil {
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t.Fatalf("ListenIP failed: %v", err)
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}
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defer c.Close()
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if la := c.LocalAddr(); la == nil {
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t.Fatal("IPConn.LocalAddr failed")
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}
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}
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}
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func TestIPConnRemoteName(t *testing.T) {
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if os.Getuid() != 0 {
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t.Skip("skipping test; must be root")
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}
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raddr := &IPAddr{IP: IPv4(127, 0, 0, 10).To4()}
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c, err := DialIP("ip:tcp", &IPAddr{IP: IPv4(127, 0, 0, 1)}, raddr)
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if err != nil {
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t.Fatalf("DialIP failed: %v", err)
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}
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defer c.Close()
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if !reflect.DeepEqual(raddr, c.RemoteAddr()) {
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t.Fatalf("got %#v, expected %#v", c.RemoteAddr(), raddr)
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}
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}
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